Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ebc6d9c157ce2e…

MALICIOUS

PDF

83.8 KB Created: 2021-09-06 09:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d468e1dd9f9045e7e3b6e8bed03b451 SHA-1: 7ee38a8fef0481e9d73d31a6154a36eb8e5dc6a9 SHA-256: d9ebc6d9c157ce2edf4ffb3df64e3bdac671588553b8fe9da833083e8197e63e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pixomot.ru/uplcv?utm_term=marathon+game+manual PDF link annotation
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160717c547b57d---81513322280.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/45709734786.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/11555544069.pdfIn PDF document text
    • https://keongracun.org/contents//files/40699980701.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8c09f0a68---soriselujefutifefadew.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70867a0925---juxamemog.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/dad157f0cc60b9812c3098f224cb0484/74714317490.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/862c6af982ed8d10b14dca74fbc996c2/76589810443.pdfIn PDF document text
    • http://xn--3bsx3iw22bmot.com/filespath/files/20210830082852.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210522235559.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdfb16d3752---zegamisuwarizulow.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/50445781985.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/gijakidusigiwodepa.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/16333152462.pdfIn PDF document text
    • http://pk.mo/userfiles/file/11740482063.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/25431906243.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/mitut.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/bad29165ad13ba5cf706704f63911253/jegakuraxipavuwut.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/viluwavopara.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/51597910467.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/23699404650.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/pevuxapodegakul.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 17256 bytes
SHA-256: 3ce99528fc5cecbd984d86b5548daf1f50b4d8083f2723a4833501ebfb0bdecd
font_01_sfnt_off000112ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FF 10388 bytes
SHA-256: 6caa72cc17b30f4e7f530ebcaf2afe21d64f09c74cbf06a4403acfb0d463a3f1
font_02_sfnt_off00012a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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